WO2012002561A1 - Composition d'organopolysiloxane durcissable et dispositif optique à semi-conducteur - Google Patents

Composition d'organopolysiloxane durcissable et dispositif optique à semi-conducteur Download PDF

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WO2012002561A1
WO2012002561A1 PCT/JP2011/065248 JP2011065248W WO2012002561A1 WO 2012002561 A1 WO2012002561 A1 WO 2012002561A1 JP 2011065248 W JP2011065248 W JP 2011065248W WO 2012002561 A1 WO2012002561 A1 WO 2012002561A1
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groups
constituent
sio
composition
organopolysiloxane
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PCT/JP2011/065248
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English (en)
Inventor
Makoto Yoshitake
Mieko Yamakawa
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Dow Corning Toray Co., Ltd.
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Priority to EP20110738059 priority Critical patent/EP2588539B1/fr
Priority to US13/806,871 priority patent/US9012586B2/en
Priority to CN201180028772.0A priority patent/CN102959015B/zh
Priority to KR1020127032665A priority patent/KR101722123B1/ko
Publication of WO2012002561A1 publication Critical patent/WO2012002561A1/fr

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    • H—ELECTRICITY
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    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
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    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/70—Siloxanes defined by use of the MDTQ nomenclature
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    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
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    • H01L2224/481—Disposition
    • H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
    • H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
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    • H01L2924/181—Encapsulation

Definitions

  • the present invention relates to a curable organopolysiloxane composition and to an optical semiconductor device having an optical semiconductor element that is sealed and/or bonded with a cured body of the aforementioned composition.
  • Curable organopolysiloxane compositions are used for sealing and/or bonding optical semiconductor elements in optical semiconductor devices having optical semiconductor elements such as photocouplers, light-emitting diodes, solid-state image pickup elements, or the like. It is required that cured bodies of such compositions neither absorb nor scatter the light emitted or received from semiconductor elements. Furthermore, in order to improve reliability of the optical semiconductor devices, it is desired that the cured bodies could not discolor or decrease in the bonding strength.
  • Japanese Unexamined Patent Application Publication (hereinafter referred to as "Kokai") 2006-342200 discloses a curable organopolysiloxane composition that can form a cured body having high hardness and high light transmittance.
  • the cured body produced from such a composition can be either easily damaged during manufacture or use of an optical semiconductor device, or can easily delaminate from the optical
  • Kokai 2007-63538 and Kokai 2008-120843 disclose curable organopolysiloxane compositions that can form cured bodies having excellent impact- resistant properties.
  • cured bodies are subject to yellowing, they are not suitable for sealing or bonding optical semiconductor elements of optical semiconductor devices that are intended for long-time use at high temperatures.
  • the curable organopolysiloxane composition of the invention comprises at least the following components:
  • constituent (A-l) comprises an organopolysiloxane of the following average compositional formula:
  • R 1 designates phenyl groups, methyl groups, or alkenyl groups having 2 to 10 carbon atoms; 0.1 to 50 mole % of all R 1 groups are alkenyl groups having 2 to 10 carbon atoms; methyl groups constitute 90 mole % or more of the sum of methyl and phenyl groups contained in R 1 ;
  • constituent (A-2) comprises an organopolysiloxane of the following average compositional formula:
  • R designates phenyl groups, methyl groups, or alkenyl groups having 2 to 10 carbon atoms; 5 to 10 mole % of all R 2 groups are alkenyl groups having 2 to 10 carbon atoms; methyl groups constitute 90 mole % or more of the sum of methyl and phenyl groups contained in R 2 ;
  • component (B) an organopolysiloxane that contains silicon-bonded hydrogen atoms and comprises 10 to 50 wt.% of constituent (B-1), 50 to 90 wt.% of constituent (B-2), and 0 to 30 wt.% of constituent (B-3), in an amount that the silicon-bonded hydrogen atoms in component (B) are in the range of 0.5 to 2.0 moles per 1 mole of the total content of alkenyl groups in component (A), wherein
  • constituent (B-1) comprises an organopolysiloxane that contains at least 0.5 wt.% of silicon-bonded hydrogen atoms and that is represented by the following average molecular formula:
  • constituent (B-2) comprises an organopolysiloxane that contains at least 0.5 wt.% of silicon-bonded hydrogen atoms and that is represented by the following average compositional formula:
  • R 4 designates phenyl groups or methyl groups; methyl groups constitute 90 mole % or more of all groups contained in R 4 ;
  • constituent (B-3) is an organopolysiloxane represented by the following average molecular formula:
  • R 6 represents phenyl groups or methyl groups; methyl groups constitute at least 90% of all groups contained in R 6 ; and "r" is a number in the range of 10 to 100; and
  • composition of the invention may be further provided with (D) fumed silica having BET specific area of 20 to 200 m /g and added in an amount of 1 to 10 parts by weight per 100 parts by weight of the sum of components (A) to (C).
  • composition of the invention When the composition of the invention is cured, it forms a cured body that has a type A durometer hardness in the range of 70 to 90 according to JIS K 6253 and that is suitable for use as an agent for sealing or bonding optical semiconductor elements, in particular light emitting diodes.
  • the optical semiconductor device of the present invention is characterized by having optical semiconductor elements sealed and/or bonded with the use of cured bodies of the aforementioned composition.
  • the curable organopolysiloxane composition of the present invention is characterized by forming a cured body having long-lasting properties of light transmittance and bondability, and having relatively low hardness.
  • the optical semiconductor device of the invention is characterized by excellent reliability.
  • Fig. 1 is a sectional view of a surface-mount light emitting diode (LED) illustrated as an example of an optical semiconductor device of the invention.
  • LED surface-mount light emitting diode
  • Component (A) which is the main component of the composition of the invention, comprises an alkenyl-containing organopolysiloxane that consists of constituents (A-l) and (A-2) which are described below.
  • Constituent (A-l) is used for improving handleability of the composition and mechanical strength of a cured body.
  • This constituent comprises an organopolysiloxane of the following average compositional formula:
  • R 1 designates phenyl groups, methyl groups, or alkenyl groups having 2 to 10 carbon atoms.
  • the alkenyl groups of R 1 can be represented by vinyl, allyl, butenyl, pentenyl, or hexenyl groups. Vinyl groups are preferable in view of their reactivity and ease of synthesis. However, 0.1 to 50 mole % of all R 1 groups are alkenyl groups. This is because if the content of the alkenyl groups is below the recommended lower limit, a cured body of the composition will have low mechanical strength, and if, on the other hand, the content of the alkenyl group exceeds the recommended upper limit, a cured body will become brittle.
  • methyl groups should constitute 90 mole % of more. This is because if the content of methyl groups is below the recommended lower limit, a cured body of the composition can easily acquire a color at a high temperature.
  • Constituent (A- 1) may have a linear, cyclic, partially cyclic, or a partially branched molecular structure. This constituent is liquid at 25°C.
  • the viscosity of this constituent at 25°C should be in the range of 3 to 1 ,000,000 mPa-s, preferably 5 to 50,000 mPa-s. If the viscosity is below the recommended lower limit, this will reduce mechanical strength of a cured body, and, if, on the other hand, the viscosity exceeds the recommended upper limit, this will impair handleability of the composition.
  • Constituent (A-l) may be represented by organopolysiloxanes expressed by the average compositional formulas given below, where Vi stands for vinyl, Me stands for methyl, and Ph stands for phenyl.
  • constituent (A-l) may be represented by organopolysiloxanes expressed by the average molecular formulas given below, Vi and Me are the same as defined above.
  • Constituent (A-2) is an organopolysiloxane that is intended for imparting hardness and mechanical strength to a cured body of the composition. This constituent is represented by the following average compositional formula:
  • R 2 designates phenyl groups, methyl groups, or alkenyl groups having 2 to 10 carbon atoms.
  • the alkenyl groups of R 2 can be represented by vinyl, allyl, butenyl, pentenyl, or hexenyl groups. Vinyl groups are preferable in view of their reactivity and ease of synthesis.
  • 5 to 10 mole % of all R 2 groups are alkenyl groups. This is because if the content of the alkenyl groups is below the recommended lower limit, a cured body of the composition will have low hardness and mechanical strength, and if, on the other hand, the content of the alkenyl group exceeds the recommended upper limit, a cured body will become brittle.
  • methyl groups should constitute 90 mole % of more. This is because if the content of methyl groups is lower than the recommended limit, a cured body of the composition can easily acquire a color at a high temperature.
  • Constituent (A-2) may have a branched or net-like molecular structure. There are no special restrictions with regard to viscosity of this constituent at 25 °C and it may be liquid or solid provided that it is miscible with constituent (A-l).
  • Constituent (A-2) may be represented by organopolysiloxanes expressed by the average compositional formulas given below, where Vi, Me, and Ph are the same as defined above.
  • component (A) contains 40 to 70 wt.% of constituent (A- 1) and 30 to 60 wt.% of constituent (A-2), and preferably 45 to 65 wt.% of constituent (A- 1) and 35 to 55 wt.% of constituent (A-2). If the content of constituent (A-l) exceeds the recommended upper limit, it will be impossible to impart a desired hardness and mechanical strength to a cured body of the composition, and if, on the other hand, the content of constituent (A-l) is below the recommended lower limit, this will impair handleability of the composition and impart brittleness to a cured body.
  • component (A) It is not necessary to premix constituents (A-l) and (A-2) of component (A) if the composition can be eventually prepared in a state of high uniformity. From the viewpoint of good handleability, component (A) should be liquid at 25°C and have a viscosity in the range of 100 to 5,000,000 mPa s, preferably 500 to 100,000 mPa s.
  • Component (B) is used in the composition as a cross-linking agent. It comprises an organopolysiloxane that has silicon-bonded hydrogen atoms and consists of constituents (B-l), (B-2), and, if necessary, constituent (B-3).
  • Constituent (B-l) acts not only as a cross-linking agent but also as an efficient interfacial bonding improver.
  • This constituent comprises an organopolysiloxane that is represented by the following average molecular formula:
  • R 3 designates phenyl groups or methyl groups; methyl groups constitute 90 mole % or more of all groups contained in R 3 . If the content of methyl groups is below the recommended limit, a cured body will acquire a color at a high temperature.
  • "j" is a number in the range of 0 to 35; and "k” is a number in the range of 5 to 100. If the value of "j" exceeds the recommended upper limit, it will be impossible to provide the composition with good bondability. If the value of "k” is below the
  • constituent (B-l) be liquid at 25°C and have viscosity at 25°C in the range of 3 to 10,000 mPa s, preferably 5 to 5,000 mPa-s. If the viscosity is below the recommended lower limit, a cured body, this will impair mechanical strength and bonding strength, and if, on the other hand, the viscosity exceeds the recommended upper limit, this will impair handleability of the composition.
  • Constituent (B-l) may be represented by organopolysiloxanes expressed by the average molecular formulas given below, where Me and Ph are the same as defined above.
  • Constituent (B-2) acts not only as a cross-linking agent but also as an efficient agent for improving mechanical strength of a cured body as well as aggregation and bonding properties.
  • Constituent (B-2) comprises an organopolysiloxane that is represented by the following average compositional formula:
  • R 4 designates phenyl groups or methyl groups. Methyl groups constitute 90 mole % or more of all groups contained in R 4 . If the content of methyl groups is below the recommended limit, this may color the cured body at a high temperature.
  • R 5 designates hydrogen atoms or alkyl groups having 1 to 10 carbon atoms. The alkyl groups of R 5 having 1 to 10 carbon atoms are represented by methyl, ethyl, and isopropyl groups.
  • the value of "1" is below the recommended lower limit, it will be impossible to achieve a desired hardness, and if, on the other hand, the value of "1" exceeds the recommended upper limit, this will reduce molecular weight of the present constituent and will not allow imparting a sufficient mechanical strength to a cured body. Furthermore, if the value of "m” exceeds the recommended upper limit, it will be impossible to achieve a desired hardness. If the value of "n” exceeds the recommended upper limit, it will be impossible to achieve a desired hardness. If the value of "o” exceeds the recommended upper limit, this will impair dispersibility of the constituent and will not allow imparting a sufficient mechanical strength to a cured body.
  • the value of "p" is below the recommended lower limit, it will be impossible to achieve as a desired hardness, and if, on the other hand, the value of "p" exceeds the recommended upper limit, this will impair dispersibility of the present constituent in the composition and will not allow obtaining a desired mechanical strength. Finally, if the value of "q" exceeds the recommended upper limit, this will reduce molecular weight of the constituent and will not allow imparting a sufficient mechanical strength to a cured body.
  • the present constituent should contain at least 0.5 wt.% of silicon-bonded hydrogen atoms. If the content of silicon-bonded hydrogen atoms is below 0.5 wt.%, it will be impossible to impart sufficient mechanical strength to a cured body. In order to improve miscibility of the present constituent with the composition, this constituent should be liquid or solid at 25°C.
  • Constituent (B-2) may be represented by organopolysiloxanes expressed by the average compositional formulas given below, where Me and Ph are the same as defined above.
  • Constituent (B-3) is an arbitrary component, which is used for controlling hardness of a cured body.
  • This constituent is an organopolysiloxane represented by the following average molecular formula:
  • R 6 designates phenyl or methyl groups and where methyl groups constitute at least 90% of all groups contained in R 6 . If the content of methyl groups is below the
  • Constituent (B-3) can be exemplified by organopolysiloxanes that are expressed by the following average molecular formulas, where Me and Ph are the same as defined above:
  • Component (B) contains 10 to 50 wt.% of constituent (B- 1 ), 50 to 90 wt.% of constituent (B-2), and 0 to 30 wt.% of constituent (B-3), preferably 15 to 35 wt.% of constituent (B-l), 65 to 85 wt.% of constituent (B-2), and 0 to 25 wt.% of constituent (B- 3). If the content of constituent (B-l) exceeds the recommended upper limit, this will reduce mechanical strength of a cured body, and if, on the other hand, the content of constituent (B-l) is below the recommended lower limit, this will reduce bonding properties of a cured body.
  • Component (B) is liuid at 25°C. From the viewpoint of good handleability, component (B) should be liquid at 25°C and have a viscosity in the range of 5 to 100,000 mPa-s, preferably 10 to 50,000 mPa-s.
  • Component (B) is added in such an amount that the silicon-bonded hydrogen atoms are in the range of 0.5 to 2.0 moles, preferably 0.8 to 1.8 moles, per 1 mole of the total content of alkenyl groups in component (A). If the content of component (B) is below the recommended lower limit, or exceeds the recommended upper limit, it will be impossible to impart to a cured body of the composition the desired hardness, mechanical characteristics, and bonding properties.
  • Component (C) is a hydrosilylation-reaction catalyst that is used for accelerating hydrosilylation reaction of the composition.
  • a catalyst can be exemplified by a platinum-based catalyst, platinum-based compound catalyst, metallic platinum catalyst, rhodium-based catalyst, or a palladium-based catalyst. From the viewpoint of efficient acceleration of the hydrosilylation reaction of components (A) and
  • Such a catalyst can be represented by fine platinum powder, platinum black, chloroplatinic acid, an alcohol-modified chloroplatinic acid, a diolefin complex of chloroplatinic acid, an olefin complex of platinum; platinum bis(acetoacetate), platinum bis(acetoacetonate), or a similar platinum-carbonyl complex; a complex of chloroplatinic acid and divinyl-tetramethyl disiloxane, a complex of chloroplatinic acid and tetravinyl-tetramethyl-cyclotetrasilane, or a similar complex of chloroplatinic acid and alkenylsiloxane; a complex of platinum and divinyltetramethyl-disiloxane, a complex of platinum and tetravinyltetramethyl-cyclotetrasiloxane, or a similar complex of platinum and alkeny
  • alkenylsiloxane may be exemplified by the following compounds:
  • platinum- alkenylsiloxane complexes can be combined with 1 ,3-divinyl-l, 1,3,3- tetramethyldisiloxane, l,3-diallyl-l,l,3,3-tetramethyldisiloxane, l,3-divinyl-l,3-dimethyl- 1 ,3-diphenyldisiloxane, 1 ,3-divinyl-l ,1 ,3,3-tetraphenyldisiloxane, 1 ,3,5,7-tetramethyl- 1 ,3,5,7-tetravinylcyclotetrasiloxane, or similar alkenylsiloxane oligomers or
  • organosiloxane oligomers such as dimethylsiloxane oligomers, especially alkenylsiloxane oligomers.
  • component (C) can be used, provided that it accelerates curing of the composition. More specifically, it is recommended to add component (C) in such an amount that in terms of weight units the content of platinum-type metal atoms, in particular platinum atoms of this component is in the range of 0.01 to 500 ppm, preferably 0.01 to 100 ppm, and more preferably 0.1 to 50 ppm. If the content of component (C) is below the recommended lower limit, it will be difficult to provide sufficient curing, and if, on the other hand, the content of component (C) exceeds the recommended upper limit, this will lead to coloration of the cured body.
  • (D) fumed silica having BET specific area in the range of 20 to 200 m 2 /g This component should be used in an amount of 1 to 10 parts by weight per 100 parts by weight of the sum of components (A), (B), and (C). If component (D) is used in such an amount that the BET specific area thereof is below or above the recommended range, this will impair handleability and will not allow obtaining a desired viscosity of the composition. Furthermore, if the content of component (D) exceeds the recommended upper limit, this will impair light transmitting properties.
  • the composition can be further provided with component (E) such as 1-ethynylcyclohexan-l- ol, 2-methyl-3-butyn-2-ol, 3,5-dimethyl-l-hexyn-3-ol, 2-phenyl-3-butyn-2-ol, or similar alkyne alcohols; 3-methyl-3-penten-l-yne, 3,5-dimethyl-3-hexen-l-yne, or similar ene-yne compounds; 1 ,3,5,7-tetramethyl-l ,3,5,7-tetravinylcyclotetrasiloxane, 1 ,3,5,7-tetramethyl- 1 ,3,5,7-tetrahexenylcyclotetrasiloxane, or similar methylalkenylsiloxane oligomers;
  • component (E) such as 1-ethynylcyclohexan-l- ol, 2-methyl-3-butyn-2-ol,
  • Component (E) is used in an amount sufficient for inhibiting gelling or curing the composition during mixing of components (A), (B), and (C) and also in an amount needed for providing long-term storage of the composition. More specifically, it is recommended to add this component in an amount of 0.0001 to 5 parts by weight, preferably 0.01 to 3 parts by weight per 100 parts by weight of the sum of components (A), (B), and (C).
  • the composition may be combined with (F) an adhesion promoter.
  • an adhesion promoter may be one known in the art and used for addition to hydrosilylation-reaction curable organopolysiloxane compositions.
  • Component (F) may be exemplified by the following compounds:
  • organosilanes or organosiloxane oligomers having 4 to 20 silicon atoms and a linear, branched, or cyclic molecular structure and containing trialkoxysiloxy groups (such as trimethoxysiloxy groups or triethoxysiloxy groups) or trialkoxysilylalkyl groups (such as trimethoxysilylethyl groups or triethoxysilylethyl groups) and hydrosilyl groups or alkenyl groups (such as vinyl groups or allyl groups); organosilanes or organosiloxane oligomers having 4 to 20 silicon atoms and a linear, branched, or cyclic molecular structure and containing trialkoxysiloxy groups or trialkoxysilylalkyl groups and methacryloxyalkyl groups (such as 3-methacryloxypropyl groups); organosilanes or organosiloxane oligomers having 4 to 20 silicon atoms and a linear, branche
  • component (F) does not contain active nitrogen atoms, e.g., amino groups.
  • This adhesion promoter is preferably a low-viscosity liquid that has a viscosity at 25°C in the range of 1 to 500 mPa-s.
  • Component (F) should be added in amounts that do not impair curing properties, in particular do not cause change of color in a cured body. More specifically, it should be added in an amount of 0.01 to 5 parts by weight, preferably 0.1 to 3 parts by weight, per 100 parts by weight of the sum of components (A), (B), and (C).
  • the composition may contain other arbitrary components such as silica, glass, zinc oxide or similar inorganic fillers; silicone rubber powder; silicone resin, polymethacrylate resin, or similar resin powders; heat-resistant agents, dyes, pigments, flame retarders, solvents, etc.
  • the composition is liquid and have a viscosity at 25°C in the range of 10 to 1,000,000 mPa-s. If the composition is intended for use as a sealant for optical semiconductor elements, it should have a viscosity at 25°C in the range of 100 to 10,000 mPa s, and if it is intended for use as a bonding agent for optical semiconductor elements, it should have a viscosity at 25 °C in the range of 1,000 to 500,000 mPa-s.
  • the composition is cured by retaining at room temperature or by heating. For acceleration of curing, it is recommended to cure the composition by heating.
  • the heating temperature should be in the range of 50 to 200°C.
  • composition provides excellent bonding durability, with respect to steel, stainless steel, aluminum, copper, silver, titanium, titanium alloy or other metals or alloys; silicon semiconductors, gallium-phosphorus-based semiconductors, gallium-arsenide- based semiconductors, gallium-nitride-based semiconductors, or similar semiconductor elements; ceramics, glass, thermosetting resins, and thermoplastic resins that contain polar groups, and in particular if the above objects are subject to heating-cooling cycles.
  • the optical semiconductor device of the invention comprises an optical semiconductor element that is either sealed in a housing by a cured body of a sealing material formed from the composition of the present invention, or is bonded to the housing with a cured body of a bonding material formed from the composition of the invention.
  • the optical semiconductor element may comprise a light-emitting diode (LED), semiconductor laser, photodiode, photo transistor, solid-state image pickup elements, or a photo-coupler light emitter and receiver. Most suitable application is a LED.
  • Such a substrate can be made from silver, gold, copper, or another electrically conductive metal; aluminum, nickel or another non-electroconductive metal; PPA (Polyphthalamide), LCP (Liquid Crystal Polymer), or another thermoplastic resin mixed with a white pigment; epoxy resin, BT resin, polyimide resin, silicone resin, or a similar thermosetting resin mixed with a white pigment; alumina, alumina nitride, or similar ceramics. Since the composition of the invention provides good bonding to semiconductor elements and substrates, it improves reliability of the obtained optical semiconductor device.
  • Fig. 1 is a sectional view of a single surface-mount type LED shown as a typical example of an optical semiconductor device.
  • the LED of Fig. 1 comprises a LED chip 5 which is die-bonded to a die pad 3 through a bonding material 4 inside a housing 1 made from a polyphthalamide resin (PPA).
  • PPA polyphthalamide resin
  • the LED chip 5, in turn, is wire-bonded to inner leads 2 by bonding wires 6, and along with the inner walls of the housing are sealed with a sealing material 7.
  • the composition that is used for forming the bonding material 4 and/or the sealing material 7 is the curable organopolysiloxane composition of the present invention.
  • the constituents that were used for the preparation of curable organopolysiloxane compositions shown in the application and comparative examples wherein Vi stands for vinyl groups, Me stands for methyl groups, and Ph stands for phenyl groups; Vi% shows the percentage of vinyl groups (mole %) in all organic groups, and Me% shows the percentage of methyl groups (mole %) in the sum of methyl groups and phenyl groups.
  • the SiH/Vi ratio is the ratio of the total number of silicon-bonded hydrogen atoms in constituents (b-1) to (b-6) to 1 mole of the sum of vinyl groups in constituents (a-1) to (a-9) contained in the composition.
  • Constituent (d-2) fumed silica having BET surface area in the range of 30 to 50 m /g and hydrophobized by surface treatment with hexamethyl disilazane
  • Viscosity of the curable organopolysiloxane compositions, as well as hardness, light transmittance, and bonding strength of the cured bodies mentioned in the application and comparative examples were measured by the methods described below.
  • the curable organopolysiloxane was formed into a cured sheet-like body by press forming for 1 hour at 150°C, and the latter was used for measuring hardness with type A durometer according to JIS K 6253.
  • the sheet-like cured body was retained for 1 ,000 hours in an oven at 150°C, and then hardness after heat-resistance test was measured by the same method as mentioned above.
  • the curable organopolysiloxane composition was sandwiched between two glass plates and cured by holding it for 1 hour at 150°C.
  • Light-transmitting properties of the obtained cured body were measured at 25 °C by a self-recording spectrophotometer (optical path: 0.1 cm) capable of measuring at any wavelength of visible light (the wavelength range of 400 nm to 700 nm).
  • Light transmission through the cured body was determined by subtracting light transmission through the glass only from light transmission through the glass and the composition.
  • the light transmittance obtained for wavelength 450 nm is shown in Table 1.
  • Spacers made from polytetrafluoroethylene were sandwiched between two silver-plated steel plates (width: 25 mm; length: 50 mm; thickness: 1 mm).
  • the gap between the plates was filled with the curable organopolysiloxane composition, the plates were clipped together, and the composition was cured by retaining the unit for 1 hour at 150°C in a hot-air-circulation type oven. After cooling to room temperature, the clip and the spacers were removed, and the bonding strength of a cured body was measured by stretching the obtained specimen in mutually opposite horizontal directions in a tensile test machine.
  • Curable organopolysiloxane compositions were prepared with component ratios shown in Table 1. Properties of cured bodies measured as described above are also shown in Table 1.
  • Curable organopolysiloxane compositions were prepared with component ratios shown in Table 2. Properties of cured bodies measured as described above are also shown in Table 2.
  • the curable organopolysiloxane composition of the invention can be used as a sealant and a bonding agent for optical semiconductor elements of LEDs, semiconductor lasers, photodiodes, photo transistors, solid-state image pickup elements, photo-coupler light emitters and receivers, etc.
  • the optical semiconductor devices of the invention may be used as optical devices, optical instruments, lighting devices, illumination devices, or similar optical semiconductor devices.

Abstract

La présente invention concerne une composition d'organopolysiloxane durcissable qui peut être utilisée en tant qu'agent de scellement ou agent de fixation pour éléments optiques à semi-conducteur et comprend au moins les composants suivants : (A) un organopolysiloxane contenant un alcényle qui comprend un constituant (A-1) d'une formule de composition moyenne et un constituant (A-2) d'une formule de composition moyenne ; (B) un organopolysiloxane qui contient des atomes d'hydrogène liés au silicium et comprend un constituant (B-1) contenant au moins 0,5 % en poids d'atomes d'hydrogène liés au silicium et représenté par une formule moléculaire moyenne, un constituant (B-2) contenant au moins 0,5 % en poids d'atomes d'hydrogène liés au silicium et représenté par une formule de composition moyenne, et, si nécessaire, un constituant (B-3) d'une formule moléculaire moyenne ; et (C) un catalyseur de réaction d'hydrosilylation. La composition peut former un corps durci qui possède des propriétés à long terme de transmittance optique et d'aptitude à la fixation, et une dureté relativement faible.
PCT/JP2011/065248 2010-06-29 2011-06-28 Composition d'organopolysiloxane durcissable et dispositif optique à semi-conducteur WO2012002561A1 (fr)

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US13/806,871 US9012586B2 (en) 2010-06-29 2011-06-28 Curable organopolysiloxane composition and optical semiconductor device
CN201180028772.0A CN102959015B (zh) 2010-06-29 2011-06-28 可固化的有机聚硅氧烷组合物及光学半导体器件
KR1020127032665A KR101722123B1 (ko) 2010-06-29 2011-06-28 경화성 오가노폴리실록산 조성물 및 광반도체 장치

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